<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>首页</title>
    <link href="main.css" rel="stylesheet" type="text/css">
 </head>
 <body>
    <ul>
        <li>列表项1</li>
        <li>列表项2</li>
    </ul>
    <ul type="square">
        <li>列表项1</li>
        <li>列表项2</li>
    </ul>
    <ol>
        <li>列表项1</li>
        <li>列表项2</li>
    </ol>
    <ol type="A" start="3">
        <li>列表项1</li>
        <li>列表项2</li>    
    </ol>
    <ul class="list1">
        <li>列表项1</li>
        <li>列表项2</li>
    </ul>
 </body>
 </html>